From c1ac89ceb76f8fb41051a7b4bce431de23c582e9 Mon Sep 17 00:00:00 2001
From: Serafeim Papastefanos <spapas@gmail.com>
Date: Thu, 3 Apr 2014 18:51:54 +0300
Subject: [PATCH] Improve JS behavior when editing slug (fixes #132)

---
 .../static/wagtailadmin/js/page-editor.js        | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/wagtail/wagtailadmin/static/wagtailadmin/js/page-editor.js b/wagtail/wagtailadmin/static/wagtailadmin/js/page-editor.js
index 647e7295b..63ffc7d29 100644
--- a/wagtail/wagtailadmin/static/wagtailadmin/js/page-editor.js
+++ b/wagtail/wagtailadmin/static/wagtailadmin/js/page-editor.js
@@ -261,8 +261,20 @@ function initSlugAutoPopulate(){
 }
 
 function initSlugCleaning(){
-    $('#id_slug').on('keyup blur', function(){
-        $(this).val(cleanForSlug($(this).val()));
+    $('#id_slug').on({
+        'blur': function(){
+            $(this).val(cleanForSlug($(this).val()));
+        },
+        'keyup': function(event){        
+            var keyCode = ('which' in event) ? event.which : event.keyCode;
+            if (
+                (keyCode != 32) && // not spacebar
+                (keyCode != 8) &&  // not backspace
+                (keyCode != 46) && // not delete
+                ((keyCode < 40) ) // non-character
+            ) return ;
+            $(this).val(cleanForSlug($(this).val()));
+        }
     });
 }